Abstract: A highly durable spring of the present invention includes a single-layer coating film with a thickness of 450 ?m or less, in which the coating film contains an epoxy resin, a phenolic resin, and zinc. The coating film has high corrosion resistance and chipping resistance even if it is a one thin layer with a thickness of 450 ?m or less. A method of coating a highly durable spring of the present invention includes an application process in which an epoxy resin-based powder coating material which contains an epoxy resin, a phenolic resin, and zinc and is produced by a melt kneading method is applied to a surface of a spring on which a coating-film is formed and a baking process in which the applied epoxy resin-based powder coating material is baked.

Abstract: A powder coating method is capable of forming a coating film having excellent adhesion and surface texture by using a thermosetting powder coating material. The powder coating method is configured to include: a heating step of heating a spring member; a coating step of causing a thermosetting powder coating material to adhere to a surface of the spring member, with a surface temperature T (° C.) of the spring member being in a range of “Tf?20?T<Tf+20” (Tf: a curing completion temperature (° C.) of the thermosetting powder coating material), and a curing step of curing the thermosetting powder coating material adhering to the surface of the spring member. In the curing step, the surface temperature T (° C.) of the spring member upon completion of the curing is desirably “Ts+30?T” (Ts: a curing start temperature (° C.) of the thermosetting powder coating material).

Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.

Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.

Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.

Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.

Abstract: In a device for electronically transforming displacement of automobile accelerator lever, an accelerator pedal and a return member are provided, the latter of which returns the accelerator lever back to an original position. A detector device is provided to detect a displacement of the accelerator lever to generate an electrical signal. The detector device has a magnetic plunger which mechanically moves in association with the accelerator lever, and further has primary and secondary coils to surround the magnetic plunger so that the magnetic plunger mechanically moves therethrough. The primary coil is energized to detect an electromotive force produced from the secondary coil. A housing encloses the plunger, and the primary and secondary coils. An engagement piece is fixed to the accelerator lever to actuate a switch which detects whether or not the accelerator pedal is stepped.